Malicious PDF — malware analysis report

Static analysis result for SHA-256 227b542ccccb8106…

MALICIOUS

PDF

85.0 KB Created: 2021-09-19 23:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 382322666d519a7296e8c699a96d3783 SHA-1: 9954c04cdb6709f2f1ad2510fb5960e449f12b91 SHA-256: 227b542ccccb81068c48e9554c5025aa2a66ca4cd8dfafbaba8a78b8e01fdc4c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains embedded JavaScript and multiple links to external sites, some of which are hosted on compromised WordPress uploads or disposable domains. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content likely attempts to trick the user into installing a malicious browser extension or update. The embedded JavaScript may be used to facilitate this or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://geose.ru/userfiles/file/88406677917.pdf In PDF document text
    • http://hani-bee.com/userfiles/files/nabawumal.pdfIn PDF document text
    • http://maydemtienvn.com/upload/files/19362933927.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/6285630189.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/71124690492.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/66360858346.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/25285264192.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/jutininovugawojodexarofor.pdfIn PDF document text
    • http://nessium.net/userfiles/file/74292259807.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/499583f084a031600d739f22371d2d2b/74110079458.pdfIn PDF document text
    • https://wittnebel.dk/file/duxereregopog.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613a642f922ea---maxuvamotatatuwuruwekapa.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/migotusav.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109161635014171.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/pafew.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/rivufeletegegovo.pdfIn PDF document text
    • https://38e5bbdfe8be.gdziezjesc.info/userfiles/file/96670628978.pdfIn PDF document text
    • https://szabolcsipeter.com/userfiles/file/87338763127.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/nubomipasokomilov.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132efdcc49ee---41141965114.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/69339057819.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/52985586345.pdfIn PDF document text
    • https://finliz.lt/i/File/24611835592.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/43627124322.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/46b390b68623f7d707922b5f6a993138.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=transferring+data+from+android+to+new+iphonePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2E 17748 bytes
SHA-256: 1c3d733823c6b01c62476335bcaddee3b5dae9d89496514bfd7a41b01d890dab
font_02_sfnt_off00012ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE3 10948 bytes
SHA-256: beec148ce25a0ac4e9418ca9916226ccc844c312a022d1944bd0263823718573

Open this report in the interactive analyzer, or submit your own file for analysis.